Patents by Inventor Douglas James Belshaw, deceased

Douglas James Belshaw, deceased has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Sample extraction system for boreholes
    Patent number: 7222668
    Abstract: For use in drawing samples of e.g water from a well. The sampling pipe is formed as an extrusion in polyethylene. The profile includes three equi-spaced channels. The profile, being triangulated, is rigid and resistant to buckling, which allows the sampling pipe to be coiled for transport to the site. Sample-tubes, pumps, etc, can be inserted into the channels. The channels can be plugged for isolation of sampling ports at different depths.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: May 29, 2007
    Assignee: Solinst Canada Limited
    Inventors: Jean Bruce Belshaw, legal representative, Jamieson Edward Champ, James Gerard Pianosi, Douglas James Belshaw, deceased